I've done this mod on about 5 F90's and no problem. Tried my first X910 last night and its been nothing but headaches. I ended up doing the winCE update which i guess wasnt necessary. then tried copying the files over. Not enough space. then i read about deleting some map files. So i did that and it copies over fine. Then i get the pioneer screen and then black. I did copy the CONTENTS of the myflash disk folder over. Not the whole folder. Im currently going to try to load a backup of the myflashdisk from the original firmware. I've been scratching my head on this one for a few hours.
A